Aviator&#39;s helmet



June 16, 1931. ALLEN 1,810,549

AVIATOR? HELMET Filed March 19, 1930 INVENTOR Patented June 16,. 1931 UNITED STATES EDMUND T. ALLEN, OF SEATTLE, WASHINGTON, ASSIGNOR TO BOEING PANY, OF SEATTLE, WASHINGTON PATENT OFFICE AVIATOR S HELMET Application, filed. March 19, 1930. Serial No. 436,977.

This invention relates to improvementsin radio receiving'and transmitting devices for use in aircraft operation, and more especially to an aviators helmet embodying ear-phones for biaural use and a transmitting device ads justably and removably mounted with respect to the mouth of the operator.

The invention has for its principal object to associate with an aviators helmet of any approved form, means whereby the aviator may efiiciently transmit or receive conversapointed out in the accompanying claims.

In the drawings Figure 1 is a front elevation of my improved form ofhelmet in use, showing the transmitting device in an operative position.

Figure 2 is a sectional side elevation of the helmet with parts removed, takenon the line AA of Figure 1. 1

Figure 3 is a side elevation showing in dotted lines the range of adjustability.

Referring now more particularly to the drawings circuit 11 embraces the transmitter and extends rearwardly to connect with any approved form of socket or the like. The earphones are likewiseincluded in another electrical circuit (not shown in the drawings).

The bolts 8 are formed with knurled heads for convenience in tightening or loosening the bolts to adjust or look the bail member in any position.

While Ihave shown a particular form of embodiment of my invention, I am aware that many minor'changes therein will readily suggest themselves to others skilled in the art without departing fromythe spirit and scope of my invention.

Having thus described the invention, what I claim as new and desire to protect by Letters Patent is 1. In a helmet,in combination with means I to support telephone receivers therein, a telephone transmitter and a support therefor pivotally supported to swingabout, and otherwise non-adjustable relative to, pivot points on the receiver-supporting means.

2. In a helmet, in combination with means to support telephone receivers therein, a telephone transmitter and a support therefor pivotally supported to swing'about, and otherwise non-adjustable relative to, pivot points on the receiver-supporting means, and means for fixing said transmitter support in any one of a plurality of adjusted positions against all except intentional movement.

3. In a helmet, in combination with'means to support telephonereceivers therein, a telephone transmitter and a bail support therefor, the ends of which have circular holes,

' pivot bolts of a size to fill said holes, carried by said receiver supports thus providing a pivot for rotation of the bail thereabout, each pivot bolt being provided with a knurled head for fixing said transmitter support in any one of a plurality of adjusted positions against all except intentional movement.

In testimony whereof I affix my signature.

EDMUND T. ALLEN.

AIRPLANE com- I 

